<template>
  <div class="editor" ref="editor" :style="styles"></div>
</template>

<script>
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";

/**
 * 参考文档：
 * https://quilljs.com
 * https://www.npmjs.com/package/vue-quill-editor
 */

export default {
  name: "Editor",
  props: {
    /** 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /** 编辑器的内容，与value属性一致 */
    content: {
      type: String,
      default: "",
    },
    /** 高度 */
    height: {
      type: Number,
      default: null,
    },
    /** 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /** Quill 全局option配置，如果配置该属性，quill options配置直接取该属性(忽略options、defaultOptions)。 */
    globalOptions: {
      type: Object,
      required: false,
      default: () => {},
    },
    /** Quill option配置 */
    options: {
      type: Object,
      required: false,
      default: () => {},
    },
    /** 是否禁用编辑器，会覆盖options、globalOptions的readOnly属性 */
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      quill: null,
      _content: "",
      defaultOptions: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          // 工具栏配置
          toolbar: [
            ["bold", "italic", "underline", "strike"], // 加粗 斜体 下划线 删除线
            ["blockquote", "code-block"], // 引用  代码块
            [{ list: "ordered" }, { list: "bullet" }], // 有序、无序列表
            [{ indent: "-1" }, { indent: "+1" }], // 缩进
            [{ size: ["small", false, "large", "huge"] }], // 字体大小
            [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
            [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
            [{ align: [] }], // 对齐方式
            ["clean"], // 清除文本格式
            ["link", "image", "video"], // 链接、图片、视频
          ],
        },
        placeholder: "请输入内容",
        readOnly: false,
      },
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
  },
  watch: {
    // Watch content change
    content(val) {
      this.watchValueHandle(val);
    },
    // Watch content change
    value(val) {
      this.watchValueHandle(val);
    },
    // Watch disabled change
    disabled(val) {
      if (this.quill) {
        this.quill.enable(!val);
      }
    },
  },
  mounted() {
    this.initialize();
  },
  beforeDestroy() {
    this.quill = null;
  },
  methods: {
    // Init Quill instance
    initialize() {
      // Options
      let options = Object.assign({}, this.defaultOptions, this.options);
      if (this.globalOptions) {
        options = this.globalOptions;
      }

      const editor = this.$refs.editor;
      // Instance
      this.quill = new Quill(editor, options);

      // Set editor content
      if (this.value || this.content) {
        this.quill.pasteHTML(this.value || this.content);
      }

      // Disabled editor
      this.quill.enable(!this.disabled);

      // Mark model as touched if editor lost focus
      this.quill.on("selection-change", (range) => {
        if (!range) {
          this.$emit("blur", this.quill);
        } else {
          this.$emit("focus", this.quill);
        }
      });

      // Update model if text changes
      this.quill.on("text-change", (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML;
        const quill = this.quill;
        const text = this.quill.getText();
        this._content = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
      });

      this.quill.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.quill.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.quill.on("editor-change", (eventName, ...args) => {
        this.$emit("on-editor-change", eventName, ...args);
      });

      // Emit ready event
      this.$emit("ready", this.quill);
    },
    watchValueHandle(value) {
      if (this.quill) {
        if (value && value !== this._content) {
          this._content = value;
          this.quill.pasteHTML(value);
        } else if (!value) {
          this.quill.setText("");
        }
      }
    },
  },
};
</script>

<style>
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>